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"I want to thank the Arms Control Association … for being such effective advocates for sensible policies to stem the proliferation of weapons of mass destruction, and most importantly, reduce the risk of nuclear war."
– Senator Joe Biden
January 28, 2004
Thomas Countryman, Board Chairman


Thomas Countryman, Chairman of the BoardThomas Countryman is the chair of the Arms Control Association board of directors, a position he has held since October 2017.

Mr. Countryman was the acting undersecretary of state for arms control and international security. He served for 35 years as a member of the U.S. Foreign Service until January 2017, achieving the rank of minister-counselor, and was appointed in October 2016 to the position of acting undersecretary of state. He simultaneously served as assistant secretary of state for international security and nonproliferation, a position he had held since September 2011.

Contact Information:
[email protected]
202-463-8270 ext. 110

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